Tweak DuckDB download logic

Author: Giorgi

DuckDB.NET.Bindings/Bindings.csproj

@@ -18,10 +18,10 @@
 
   <!-- Download and include the native libraries into the nuget package-->
   <Target Name="DownloadNativeLibs" BeforeTargets="GenerateAdditionalSources" Condition="'$(BuildType)' == 'Full' ">
-    <MSBuild Projects="DownloadNativeLibs.targets" Properties="Rid=win-x64;LibUrl=$(DuckDbArtifactRoot)/libduckdb-windows-amd64.zip" />
-    <MSBuild Projects="DownloadNativeLibs.targets" Properties="Rid=linux-x64;LibUrl=$(DuckDbArtifactRoot)/libduckdb-linux-amd64.zip" />
-    <MSBuild Condition=" '$(SkipLinuxArm)' == '' " Projects="DownloadNativeLibs.targets" Properties="Rid=linux-arm64;LibUrl=$(DuckDbArtifactRoot)/libduckdb-linux-aarch64.zip" />
-    <MSBuild Projects="DownloadNativeLibs.targets" Properties="Rid=osx;LibUrl=$(DuckDbArtifactRoot)/libduckdb-osx-universal.zip" />
+    <MSBuild Condition="$([MSBuild]::IsOSPlatform('Windows'))" Projects="DownloadNativeLibs.targets" Properties="Rid=win-x64;LibUrl=$(DuckDbArtifactRoot)/libduckdb-windows-amd64.zip" />
+    <MSBuild Condition="$([MSBuild]::IsOSPlatform('Linux'))" Projects="DownloadNativeLibs.targets" Properties="Rid=linux-x64;LibUrl=$(DuckDbArtifactRoot)/libduckdb-linux-amd64.zip" />
+    <MSBuild Condition="'$(SkipLinuxArm)' == '' And $([MSBuild]::IsOSPlatform('Linux'))" Projects="DownloadNativeLibs.targets" Properties="Rid=linux-arm64;LibUrl=$(DuckDbArtifactRoot)/libduckdb-linux-aarch64.zip" />
+    <MSBuild Condition="$([MSBuild]::IsOSPlatform('OSX'))" Projects="DownloadNativeLibs.targets" Properties="Rid=osx;LibUrl=$(DuckDbArtifactRoot)/libduckdb-osx-universal.zip" />
   </Target>
   <Target Name="CleanNativeLibs" BeforeTargets="Clean" Condition="'$(BuildType)' == 'Full' ">
     <RemoveDir Directories="obj\runtimes" />